Viconics VH20 User Manual
Vh20 electronic humidity transmitter series

1
VH20 Electronic Humidity Transmitter Series
Description
The VH20 series, microcomputer-based humidity transmitters are designed for
accurate humidity sensing in non-corrosive commercial applications such as:
hospitals, schools, office buildings, retail stores, museums and computer rooms.
Features
Benefits
Microcomputer-based
Exceptional accuracy and linearity
2% models 10 point calibration
3% models 3 point calibration
Increased accuracy and linearity across the
required control range
Timed RH level status LED
Rapid trouble-shooting and commissioning.
Humidity level is proportional to a 10 second
duty cycle. Ex, using a time clock, if pulse
duration is 6.5 seconds, sensed % RH by
transmitter is 65% RH
Elegant aesthetic design
Blends well in all environments
Various additional temperature
sensor options available
More functionality for DDC system installation
by combining local temperature and humidity
sensing in a single component
Available models
Model
Output
Accuracy
Temperature Sensor
Mounting
Extension
VH2
0 0-5 / 0-10 V
2 +/- 2%
0 None
W Wall
1 4-20 mA
3 +/- 3%
1 3K Ohms thermistor
+/- 1%
D Duct
2 10K Ohms Type 2
+/- 1%
E Outdoor
3 10K Ohms Type 3
+/- 1%
4 100K Ohms thermistor
+/- 1%
5 1K Ohm NIFE
6 100 Ohms Platinum
7 1K Ohm Platinum
VH2
0
2
2
W
1000
Example: Above model is VH2022W1000 for wall mount, 2% accuracy, 0-10 or 0-5 Vdc output with 10K Ohms Type 2
temperature sensor.
Models description
Model:
Description:
Application:
Picture:
VH20 Wall
Room sensor
Remote room humidity sensing
Accessory temperature sensor available
VH20 Duct
Duct sensor with
junction box
Remote return air humidity sensing with the
sensor mounted on the return air duct.
Outside air humidity sensing with the sensor
installed in the fresh air plenum.
Supply air humidity sensor
Accessory temperature sensor available
VH20
Exterior
Outside air
sensor, NEMA 4
enclosure
Outside air humidity sensing with the sensor
installed directly exposed to the elements.
Sensor uses a water resistant NEMA 4 PVC
enclosure for outdoor applications
Accessory temperature sensor available